US11958860B2 - Crystal form of compound, and preparation method therefor and use thereof - Google Patents

Crystal form of compound, and preparation method therefor and use thereof Download PDF

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US11958860B2
US11958860B2 US18/273,083 US202118273083A US11958860B2 US 11958860 B2 US11958860 B2 US 11958860B2 US 202118273083 A US202118273083 A US 202118273083A US 11958860 B2 US11958860 B2 US 11958860B2
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crystal form
compound
crystal
group
pattern
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US20240043437A1 (en
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Wei Xiao
Wei Zhang
Yingguang Li
Qingming Guo
Shasha GU
Hanfei HU
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Jiangsu Kanion Pharmaceutical Co Ltd
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Jiangsu Kanion Pharmaceutical Co Ltd
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Assigned to JIANGSU KANION PHARMACEUTICAL CO., LTD. reassignment JIANGSU KANION PHARMACEUTICAL CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GU, Shasha, GUO, Qingming, HU, Hanfei, LI, Yingguang, XIAO, WEI, ZHANG, WEI
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P13/00—Drugs for disorders of the urinary system
    • A61P13/08—Drugs for disorders of the urinary system of the prostate
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D455/00—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine
    • C07D455/03—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing quinolizine ring systems directly condensed with at least one six-membered carbocyclic ring, e.g. protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D491/00—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00
    • C07D491/12—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00 in which the condensed system contains three hetero rings
    • C07D491/14—Ortho-condensed systems
    • C07D491/147—Ortho-condensed systems the condensed system containing one ring with oxygen as ring hetero atom and two rings with nitrogen as ring hetero atom
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/47—Quinolines; Isoquinolines
    • A61K31/4738—Quinolines; Isoquinolines ortho- or peri-condensed with heterocyclic ring systems
    • A61K31/4745—Quinolines; Isoquinolines ortho- or peri-condensed with heterocyclic ring systems condensed with ring systems having nitrogen as a ring hetero atom, e.g. phenantrolines
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
    • C07B2200/00—Indexing scheme relating to specific properties of organic compounds
    • C07B2200/13—Crystalline forms, e.g. polymorphs

Definitions

  • the present invention relates to the field of pharmaceutical chemistry, and in particular, to a crystal form of a compound and a preparation method therefor and a use thereof.
  • Benign prostate hyperplasia is a common physiological disease in middle-aged and elderly men. More than half of men over 50 years old around the world suffer from prostate diseases, and such prostate diseases have become one of the main diseases in the urinary system of the elderly.
  • ⁇ 1-AR ⁇ 1 adrenergic receptor
  • Crystal forms of drugs may affect their dissolution and absorption in vivo and then may affect their clinical efficacy and safety to some extent, and in particular, crystal forms of some insoluble oral solid or semi-solid preparations have a more serious impact on the above situations.
  • the objective of the present invention is to provide a crystal form of a compound of formula I, where the crystal form has high stability, low hygroscopicity, and ease of processing.
  • the present invention proposes a crystal form A of a compound of formula I,
  • an X-ray powder diffraction pattern of the crystal form A includes three or more 2 ⁇ values selected from the group consisting of:
  • the X-ray powder diffraction pattern of the crystal form A includes the 2 ⁇ value selected from the group consisting of:
  • the X-ray powder diffraction pattern of the crystal form A includes three or more 2 ⁇ values selected from the group consisting of:
  • a relative intensity corresponding to a position peak of the 2 ⁇ value is:
  • the crystal form A has a characteristic peak at d values of three or more interplanar crystal spacings selected from the group consisting of: 7.2 ⁇ 0.2 ⁇ , 6.6 ⁇ 0.2 ⁇ , 5.8 ⁇ 0.2 ⁇ , 5.5 ⁇ 0.2 ⁇ , 5.2 ⁇ 0.2 ⁇ , 4.5 ⁇ 0.2 ⁇ , 4.1 ⁇ 0.2 ⁇ , 3.6 ⁇ 0.2 ⁇ , and 3.5 ⁇ 0.2 ⁇ .
  • the crystal form A has the XRPD pattern substantially as shown in FIG. 2 , or the X-ray powder diffraction pattern of the crystal form A is substantially as shown in Table 1; the 2 ⁇ value of each characteristic peak at the 2 ⁇ value optionally has an error margin of ⁇ 0.2°, or preferably has an error margin of ⁇ 0.1°.
  • crystal form A has one or more characteristics selected from the group consisting of:
  • an IR spectrogram of the crystal form A includes three or more characteristic absorption peaks denoted as a wavelength of ⁇ and selected from the group of consisting of: 3599 ⁇ 2 cm ⁇ 1 , 3001 ⁇ 2 cm ⁇ 1 , 2934 ⁇ 2 cm ⁇ 1 , 2835 ⁇ 2 cm ⁇ 1 , 2789 ⁇ 2 cm ⁇ 1 , 1611 ⁇ 2 cm ⁇ 1 , 1520 ⁇ 2 cm ⁇ 1 , 1485 ⁇ 2 cm ⁇ 1 , 1452 ⁇ 2 cm ⁇ 1 , 1348 ⁇ 2 cm ⁇ 1 , 1248 ⁇ 2 cm ⁇ 1 , 1217 ⁇ 2 cm ⁇ 1 , 1107 ⁇ 2 cm ⁇ 1 , 1030 ⁇ 2 cm ⁇ 1 , 995 ⁇ 2 cm ⁇ 1 , 926 ⁇ 2 cm ⁇ 1 , and 856 ⁇ 2 cm ⁇ 1 ; more preferably, each of the characteristic absorption peaks has an error margin of ⁇ 1 cm ⁇ 1 .
  • crystal form A has one or more characteristics selected from the group consisting of:
  • the present invention further provides a crystalline composition, where the crystalline composition includes the crystal form A as described in any one of the foregoing.
  • a weight percentage of the crystal form A is 60%-99.999%, preferably 80%-99.999%, and more preferably 90%-99.999%.
  • the crystalline composition further includes: a crystal of a compound of an amorphous form A in formula I or an amorphous compound of formula I.
  • the present invention further provides a preparation method for the crystal form A, and the method includes the following steps:
  • the inert solvent is selected from isopropyl alcohol or hexane.
  • a weight-to-volume ratio of the compound of formula I in the inert solvent is 10-100 mg/mL, preferably 15-50 mg/mL, and more preferably 20-40 mg/mL.
  • the stirring has one or more characteristics selected from the group consisting of:
  • the present invention further provides a use of the crystal form A as described in any one of the foregoing or the crystalline composition as previously described, where the crystal form A or the crystalline composition may be used for preparing drugs for preventing and/or treating benign prostate hyperplasia diseases.
  • the present invention further provides a drug including the crystal form A as described in any one of the foregoing or the crystalline composition as previously described and a pharmaceutically acceptable carrier.
  • the carrier is selected from the group consisting of: a filler, a disintegrating agent, a lubricant, or a combination thereof.
  • the filler is selected from the group consisting of: pregelatinized starch, lactose, microcrystalline cellulose, dextrin, mannitol, magnesium oxide, calcium sulfate, or a combination thereof.
  • the disintegrating agent is selected from the group consisting of: carboxymethyl cellulose and a salt thereof, cross-linked carboxymethyl cellulose and a salt thereof, polyvinylpyrrolidone cross-linked, sodium carboxymethyl starch, low-substituted hydroxypropyl cellulose, or a combination thereof.
  • the lubricant is selected from the group consisting of: magnesium stearate, calcium stearate, or a combination thereof.
  • FIG. 1 shows a polarizing microscope photograph of a crystal form A in Example 1.
  • FIG. 2 shows an X-ray powder diffraction (XRPD) pattern of a crystal form A in Example 1.
  • FIG. 3 shows a thermo gravimetric analysis (TGA) pattern of a crystal form A in Example 1.
  • FIG. 4 shows a differential scanning calorimetry (DSC) pattern of a crystal form A in Example 1.
  • FIG. 5 shows a dynamic vapor sorption (DVS) pattern of a crystal form A in Example 1.
  • FIG. 6 shows an infrared (IR) spectrogram of a crystal form A in Example 1.
  • FIG. 7 shows an X-ray powder diffraction (XRPD) pattern of a crystal form B in Comparative Example 1.
  • FIG. 8 shows an X-ray powder diffraction (XRPD) pattern of a crystal form C in Comparative Example 2.
  • FIG. 9 shows an X-ray powder diffraction (XRPD) pattern of a crystal form D in Comparative Example 3.
  • the inventors After making the extensive and in-depth study and performing extensive screening and test, the inventors provide a crystal form A of a compound of formula I, where the crystal form A of the compound of the present invention does not contain water and a solvent, has high stability, low hygroscopicity, and ease of processing, and is suitable for patent medicine.
  • the present invention is implemented on this basis.
  • the term “approximately” means that the value may vary by no more than 1% from the enumerated value.
  • the expression “approximately 100” includes all values between 99 and 101 (for example, 99.1, 99.2, 99.3, and 99.4).
  • the terms “contain” or “include” may be inclusive, semi-exclusive, or exclusive. In other words, the terms also include “substantially consisting of” or “consisting of”.
  • a quantity of n or more refers to any positive integer (for example, n, n+1, . . . ) including n and greater than n, where an upper limit Nup is the number of all values in the group.
  • an upper limit Nup is the number of all values in the group.
  • “one or more” includes not only all positive integers of the upper limit Nup of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, . . .
  • inert solvent refers to a solvent that does not react with the compound of formula I of the present invention. Preferably, none of the solvents used in the preparation method for the crystal form A of the present invention reacts with the compound of formula I.
  • ambient temperature or “normal temperature” means that the temperature is 4-32° C., and preferably 25 ⁇ 5° C.
  • Solid exists either in an amorphous form or in a crystalline form.
  • molecules are positioned in a three-dimensional crystal lattice.
  • a compound can be crystallized in different spatial lattice arrangements (such property is called “heteromorphism”) to form crystals with different crystal forms, where such crystal forms are called “polymorph”.
  • heteromorphism such property is called “heteromorphism”
  • Different polymorphs of a given substance may differ from each other in one or more physical properties, such as solubility, dissolution rate, true specific gravity, crystal form, stacking mode, fluidity, and/or solid stability.
  • crystal form A As used herein, “crystal form A”, “crystal form A of compound of formula I”, “crystal form A of the present invention”, “crystal form A of S-( ⁇ )-2,3-methylenedioxy-5,8,13,13a-tetrahydro-10,11-dimethoxy-6H-dibenzo[a, g]quinolizine” can be used interchangeably.
  • the present invention provides a crystal form A of a compound of formula I,
  • an X-ray powder diffraction pattern of the crystal form A includes three or more 2 ⁇ values selected from the group consisting of:
  • the X-ray powder diffraction pattern of the crystal form A includes three or more 2 ⁇ values selected from the group consisting of:
  • a relative intensity corresponding to a position peak of the 2 ⁇ value is:
  • the crystal form A has a characteristic peak at d values of three or more interplanar crystal spacings selected from the group consisting of: 7.2 ⁇ 0.2 ⁇ , 6.6 ⁇ 0.2 ⁇ , 5.8 ⁇ 0.2 ⁇ , 5.5 ⁇ 0.2 ⁇ , 5.2 ⁇ 0.2 ⁇ , 4.5 ⁇ 0.2 ⁇ , 4.1 ⁇ 0.2 ⁇ , 3.6 ⁇ 0.2 ⁇ , and 3.5 ⁇ 0.2 ⁇ .
  • the crystal form A has the XRPD pattern substantially as shown in FIG. 2 , or the X-ray powder diffraction pattern of the crystal form A is substantially as shown in Table 1.
  • the 2 ⁇ value of each characteristic peak at the 2 ⁇ value optionally has an error margin of ⁇ 0.2°, or preferably has an error margin of ⁇ 0.1°.
  • crystal form A has one or more characteristics selected from the group consisting of:
  • the IR spectrogram of the crystal form A includes three or more characteristic absorption peaks denoted as a wavelength of ⁇ and selected from the group of consisting of: 3599 ⁇ 2 cm ⁇ 1 , 3001 ⁇ 2 cm ⁇ 1 , 2934 ⁇ 2 cm ⁇ 1 , 2835 ⁇ 2 cm ⁇ 1 , 2789 ⁇ 2 cm ⁇ 1 , 1611 ⁇ 2 cm ⁇ 1 , 1520 ⁇ 2 cm ⁇ 1 , 1485 ⁇ 2 cm ⁇ 1 , 1452 ⁇ 2 cm ⁇ 1 , 1348 ⁇ 2 cm ⁇ 1 , 1248 ⁇ 2 cm ⁇ 1 , 1217 ⁇ 2 cm ⁇ 1 , 1107 ⁇ 2 cm ⁇ 1 , 1030 ⁇ 2 cm ⁇ 1 , 995 ⁇ 2 cm ⁇ 1 , 926 ⁇ 2 cm ⁇ 1 , and 856 ⁇ 2 cm ⁇ 1 ; more preferably, each of the characteristic absorption peaks has an error margin of ⁇ 1 cm ⁇ 1 .
  • crystal form A has one or more characteristics selected from the group consisting of:
  • the present invention further provides a crystalline composition, where the crystalline composition includes the crystal form A according to a first aspect of the present invention.
  • a weight percentage of the crystal form A is 60%-99.999%, preferably 80%-99.999%, and more preferably 90%-99.999%.
  • the crystalline composition further includes: a crystal of a compound of an amorphous form A in formula I or an amorphous compound of formula I.
  • the solubility limit of a target compound can be exceeded, thus implementing the crystallization of the compound on a production scale.
  • This can be implemented by various methods, for example, dissolving the compound at a relatively high temperature, and then cooling the solution below a saturation limit thereof. Alternatively, this can also be implemented through boiling, atmospheric evaporation, vacuum drying or some other methods to reduce a liquid volume.
  • the solubility of the compound of interest can be reduced by adding an anti-solvent, a solvent in which the compound has low solubility, or a mixture of such solvents. Another alternative is to adjust a pH value to reduce the solubility of the compound.
  • Optimization of crystallization may include seeding crystals in a desired form into a crystallization medium.
  • a combination of the above strategies serves as many crystallization methods.
  • the compound of interest is dissolved in a solvent at a high temperature, and then an appropriate volume of anti-solvent is added in a controlled manner, so that the resulting solution is just below a saturation level.
  • seeds in a desired form can be added and kept for the integrity thereof, and the resulting solution can be cooled to implement crystallization.
  • the present invention further provides a preparation method for the crystal form A, and the method includes the following steps:
  • the inert solvent is selected from isopropyl alcohol or hexane.
  • a weight-to-volume ratio of the compound of formula I in the inert solvent is 10-100 mg/mL, preferably 15-50 mg/mL, and more preferably 20-40 mg/mL.
  • the stirring has one or more characteristics selected from the group consisting of:
  • raw materials for the foregoing preparation methods are amorphous compounds of formula I.
  • crystal forms A obtained by the foregoing preparation methods can be subjected to filtration, drying, and other steps by conventional methods in the art as required.
  • the filtration can be selected from, but not limited to, filtration after centrifugation, pressure filtration, or vacuum filtration.
  • the drying can be selected from, but not limited to, vacuum drying or oven drying.
  • the pharmaceutical composition of the present invention includes the crystal form A of a safe and effective amount of the compound of formula I and a pharmaceutically acceptable carrier.
  • the “active component” of the present invention refers to the compound of formula I described herein, and preferably refers to the crystal form A of the present invention.
  • a weight percentage of the crystal form A is 60%-99.999%, preferably 80%-99.999%, and more preferably 90%-99.999%.
  • the crystal form A, crystalline composition, and pharmaceutical composition of the present invention can be used for preventing and/or treating benign prostate hyperplasia diseases.
  • the “safe and effective amount” means that an amount of compound is enough to obviously alleviate patient's conditions without causing serious side effects.
  • the pharmaceutical composition includes 1-2000 mg of the crystal form A of the present invention per dose, and more preferably, 10-500 mg of the compound of the present invention per dose.
  • the “one dose” is a capsule or a tablet.
  • the “pharmaceutically acceptable carrier” refers to one or more compatible solid or liquid fillers or gelatinous masses that are suitable for human use and must have sufficient purity and low toxicity.
  • the “compatible” herein means that all components in the composition can be blended with each other or the compound of the present invention, which does not significantly reduce the efficacy of the compound.
  • the pharmaceutically acceptable carrier includes cellulose and derivatives thereof (such as sodium carboxymethyl cellulose, sodium carboxyethyl cellulose, and cellulose acetate), gelatin, talc, solid lubricant (such as stearic acid and magnesium stearate), calcium sulfate, vegetable oil (such as soybean oil, sesame oil, peanut oil, and olive oil), polyhydric alcohols (such as propylene glycol, glycerol, mannitol, and sorbitol), emulsifier (such as Tween®), moistening agent (such as sodium dodecyl sulfate), coloring agent, flavoring agent, stabilizer, antioxidant, preservative, reagent water, and the like.
  • cellulose and derivatives thereof such as sodium carboxymethyl cellulose, sodium carboxyethyl cellulose, and cellulose acetate
  • gelatin such as soybean oil, sesame oil, peanut oil, and olive oil
  • polyhydric alcohols such as propylene glycol, gly
  • An administration manner of the compound or pharmaceutical composition of the present invention is not particularly limited, and a representative administration manner thereof includes, but is not limited to, oral administration, rectal administration, parenteral administration (intravenous administration, intramuscular administration, or subcutaneous administration), and topical administration.
  • a therapeutically effective dose of the crystal form A of the present invention ranges from: approximately 1-2000 mg/day, approximately 10-1000 mg/day, approximately 10-500 mg/day, approximately 10-250 mg/day, approximately 10-100 mg/day, or approximately 10-50 mg/day.
  • the therapeutically effective dose will be administered in one or more doses.
  • a specific dose of the compound of the present invention for any specific patient is determined depending on many factors, for example, age, gender, weight, general health, diet, individual response, and administration time of patient to be treated, severity of disease to be treated, as well as activity, dosage form, application mode, and concomitant drug of specific compound to be administered.
  • the therapeutically effective dose in a given situation can be determined by clinicians or doctors through conventional experiments. In any case, the compound or composition will be administered in multiple doses based on the individual conditions of the patient and in a manner that allows the delivery of a therapeutically effective dose.
  • X-ray diffraction is a structural analysis method to analyze the spatial distribution of internal atoms in a substance with X-ray diffraction formed by crystals.
  • X-rays with a specific wavelength are scattered because they encounter regularly arranged atoms or ions in the crystals, and phases of the scattered X-rays are strengthened in some directions, which shows a specific diffraction phenomenon corresponding to a crystalline texture.
  • test parameters of the XRD are as follows: device model: Bruker D8advance; target: Cu-K ⁇ (40 kV, 40 mA); distance from a sample to a detector: 30 cm; scanning range: 3°-40° (2 ⁇ value); and scanning step size: 0.1s.
  • thermo gravimetric analysis is an analysis technique to determine the change of mass of substances with temperature under conditions of programmed temperature control. Heat generated by the thermo change of the sample can be obtained through thermo gravimetric analysis.
  • thermo gravimetric analysis is suitable for detecting the loss of crystallization solvents or crystallization water molecules in crystalline substances or the process and magnitude of sublimation and decomposition of the sample, and can also effectively distinguish whether the substances contain the crystallization solvents or the crystallization water molecules.
  • test parameters of the TGA are as follows: device model: Netzsch TG 209F3; temperature range: 30-400° C.; scanning rate: 10 k/min; purge gas: 25 ml/min; and protective gas: 15 mL/min.
  • DSC Differential scanning calorimetry
  • test parameters of the DSC are as follows: device model: Perkin Elmer DSC 8500; nitrogen flow rate: 20 mL/min; temperature range: 50-200° C.; and scanning rate: 10° C./min.
  • Infrared spectrometry is an earliest analysis method used to identify crystalline substances. Because covalent bonds of different crystal molecules have a different electrical environment, the intensity of the covalent bonds may also change, and such change will inevitably lead to different IR spectra of different crystal forms.
  • test parameters of the IR are as follows: device model: Nicolet 6700 Fourier transform infrared spectrometer; and single-point ATR method with resolution of 4.0 cm ⁇ 1 .
  • Dynamic vapor sorption (DVS) test/hygroscopicity test is to quickly determine the increase and loss of sample moisture caused by a flowing carrier gas with a set relative humidity (RH).
  • the sample is placed on a high-sensitivity and high-stability digital micro-balancer in a self-suspension state, and then the sorption/desorption of water vapor is detected by determining the increase/decrease of material mass, so as to determine the hygroscopicity of the sample.
  • test parameters of the DVS are as follows: device model: SMS DVS Intrinsic; 0-95% RH; temperature: 25° C.
  • the model of the polarizing microscope is XPV-400E.
  • the crystal form A of the crystal prepared in Example 1 was tested for polarizing microscope imaging, XRPD, TGA, DSC, DVS, IR, Raman, and the like, with characterization results shown in FIG. 1 - FIG. 7 .
  • FIG. 1 shows a polarizing microscope photograph of a crystal form A, and it can be seen from FIG. 1 that the crystal form A is a block-shaped crystal.
  • FIG. 2 shows an XRPD pattern of a crystal form A (a peak table is as shown in Table 1).
  • FIG. 3 shows a TGA pattern of a crystal form A. It can be seen from FIG. 3 that the crystal form A has no gravimetric loss before the compound is decomposed, indicating that the crystal form A does not contain water or other solvents.
  • FIG. 4 shows a differential scanning calorimetry (DSC) pattern of a crystal form A. It can be seen from FIG. 4 that DSC corresponding to the crystal form A shows that a fusion peak temperature is 172.5° C. at oneset of approximately 170.3° C.
  • FIG. 5 shows a dynamic vapor sorption (DVS) pattern of a crystal form A. It can be seen from FIG. 5 that the crystal form A has slight change in hygroscopicity (approximately 0.6%) and weight at relative humidity of 0-95%, indicating that the crystal form A has low hygroscopicity.
  • FIG. 6 shows an infrared (IR) spectrogram of a crystal form A. It can be seen from FIG. 6 that the crystal form A has characteristic absorption peaks at 3599 ⁇ 2 cm ⁇ 1 , 3001 ⁇ 2 cm ⁇ 1 , 2934 ⁇ 2 cm ⁇ 1 , 2835 ⁇ 2 cm ⁇ 1 , 2789 ⁇ 2 cm ⁇ 1 , 1611 ⁇ 2 cm ⁇ 1 , 1520 ⁇ 2 cm ⁇ 1 , 1485 ⁇ 2 cm ⁇ 1 , 1452 ⁇ 2 cm ⁇ 1 , 1348 ⁇ 2 cm ⁇ 1 , 1248 ⁇ 2 cm ⁇ 1 , 1217 ⁇ 2 cm ⁇ 1 , 1107 ⁇ 2 cm ⁇ 1 , 1030 ⁇ 2 cm ⁇ 1 , 995 ⁇ 2 cm ⁇ 1 , 926 ⁇ 2 cm ⁇ 1 , and 856 ⁇ 2 cm ⁇ 1 .
  • IR infrared
  • Form A is a most stable crystal form.
  • a dynamic vapor sorption (DVS) device is used to investigate the moisture sorption and desorption of samples at a temperature of 25° C. and a relative humidity of 0-95%, so as to determine the hygroscopic sorption properties of different crystal forms.
  • Experimental results are as follows:
  • composition Dose Active pharmaceutical 1 part ingredient (crystal form A/B/C/D) Sucrase 24 parts Lactose 24 parts Polyvinylpyrrolidone 0.3 parts cross-linked (CL-M) Povidone K30 0.3 parts
  • pilot-scale samples prepared according to the preparation process, including sample A, sample B, sample C, and sample D, respectively.
  • an accelerated stability test is carried out for the four batches of samples.
  • the above samples are respectively packaged by polyester/aluminum/polyethylene composite membranes for packaging, placed for 6 months at a temperature of 40° C. and a relative humidity of 75%. During the test, samples are taken once at 0, 1, 3, and 6 months respectively, and inspected according to stability test items thereof.
  • the crystal form A of the present invention does not contain water or a solvent, is of a columnar crystal, and has good physical stability and relatively low hygroscopicity at a relative humidity of 0-95%. Therefore, the crystal form A is very suitable for processing of patent medicine.
  • the crystal form A of the compound of formula I of the present invention is easy to collect and not easy to raise and cause waste during the manufacturing of drugs such as sub-packaging, and is helpful to protect the health of operators.

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